//
//  OAAsynchronousDataFetcher.m
//  OAuthConsumer
//
//  Created by Zsombor Szabó on 12/3/08.
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.

#import "OAAsynchronousDataFetcher.h"

#import "OAServiceTicket.h"

@implementation OAAsynchronousDataFetcher

+ (id)asynchronousFetcherWithRequest:(OAMutableURLRequest *)aRequest delegate:(id)aDelegate didFinishSelector:(SEL)finishSelector didFailSelector:(SEL)failSelector
{
  return [[[OAAsynchronousDataFetcher alloc] initWithRequest:aRequest delegate:aDelegate didFinishSelector:finishSelector didFailSelector:failSelector] autorelease];
}

- (id)initWithRequest:(OAMutableURLRequest *)aRequest delegate:(id)aDelegate didFinishSelector:(SEL)finishSelector didFailSelector:(SEL)failSelector
{
  if (self = [super init])
  {
    request = [aRequest retain];
    delegate = aDelegate;
    didFinishSelector = finishSelector;
    didFailSelector = failSelector;  
  }
  return self;
}

- (void)start
{    
  [request prepare];
  
  if (connection)
    [connection release];
  
  connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
  
  if (connection)
  {
    if (responseData)
      [responseData release];
    responseData = [[NSMutableData data] retain];
  }
  else
  {
    OAServiceTicket *ticket= [[OAServiceTicket alloc] initWithRequest:request
                                                             response:nil
                                                           didSucceed:NO];
    [delegate performSelector:didFailSelector
                   withObject:ticket
                   withObject:nil];
    [ticket release];
  }
}

- (void)cancel
{
  if (connection)
    [connection cancel];
}

- (void)dealloc
{
  if (request) [request release];
  if (connection) [connection release];
  if (response) [response release];
  if (responseData) [responseData release];
  [super dealloc];
}

#pragma mark -
#pragma mark NSURLConnection's delegate methods

- (void)connection:(NSURLConnection *)aConnection didReceiveResponse:(NSURLResponse *)aResponse
{
  if (response)
    [response release];
  response = [aResponse retain];
  [responseData setLength:0];
}

- (void)connection:(NSURLConnection *)aConnection didReceiveData:(NSData *)data
{
  [responseData appendData:data];
}

- (void)connection:(NSURLConnection *)aConnection didFailWithError:(NSError *)error
{
  OAServiceTicket *ticket= [[OAServiceTicket alloc] initWithRequest:request
                                                           response:response
                                                         didSucceed:NO];
  [delegate performSelector:didFailSelector
                 withObject:ticket
                 withObject:error];
  
  [ticket release];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)aConnection
{
  OAServiceTicket *ticket = [[OAServiceTicket alloc] initWithRequest:request
                                                            response:response
                                                          didSucceed:[(NSHTTPURLResponse *)response statusCode] < 400];
  [delegate performSelector:didFinishSelector
                 withObject:ticket
                 withObject:responseData];
  
  [ticket release];
}

@end

